Definition of: add

(ad) v.t.
1. To join or unite, so as to increase the importance, size, quantity or number: to add more weight to the load; add insult to injury.
2. To find the sum of, as a column of figures; unite in a total.
3. To say or write further.
—v.i.
4. To produce an increase in: with to: My new duties added to my worries.
5. To perform the arithmetical process of addition.
—to add up
1. To accumulate to a total.
2. Colloq. To make sense. [<L addere <ad- to + dare give]
— add′a·bil′i·ty, add′i·bil′i·ty noun
—add′a·ble, add′i·ble adjective Synonyms: adjoin, affix, amplify, annex, append, attach, augment, enlarge, extend, increase, subjoin. To add is to increase by adjoining or uniting: in distinction from multiply, which is to increase by repeating. To augment a thing is to increase it by any means, but this word chiefly indicates an extension of volume. We may enlarge a house, a farm, or an empire, extend influence or dominion, augment a stream, power, or influence, attach or annex a building to one that it adjoins, or annex a territory, affix a seal or a signature, attach a condition to a promise. A speaker may amplify a discourse by a fuller treatment throughout than was originally planned, or he may append or subjoin certain remarks without change of what has gone before. Antonyms: abstract, deduct, diminish, dissever, lessen, reduce, remove, subtract, withdraw.